PPG SIGMADUR™ 550

PRODUCT DATA SHEET 

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COLOR AND GLOSS LEVEL

• White and various other colors (see SIGMACARE shade card)
• Gloss

Note: Certain colors (red, orange, yellow) may require extra coats for hiding, especially over contrasting primers.

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BASIC DATA AT 20°C (68°F)

Data for mixed product

• Number of components: Two
• Mass density: 1.3 kg/l (10.8 lb/US gal)
• Volume solids: 55 ± 2%
• VOC (Supplied):
  • Directive 2010/75/EU, SED: max. 334.0 g/kg
  • EUR Directive 2004/42/IIA(i)(500): 459 g/l
  • max. 430.0 g/l (approx. 3.6 lb/US gal)
• Recommended dry film thickness: 50–75 µm (2.0–3.0 mils) depending on system
• Theoretical spreading rate: 11.0 m²/l for 50 µm (441 ft²/US gal for 2.0 mils)
• Dry to touch: 1 hour
• Overcoating interval: Min 6 hours – Max Unlimited
• Full cure: 4 days
• Shelf life:
  • Base: ≥36 months (cool, dry storage)
  • Hardener: ≥24 months (cool, dry storage)

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RECOMMENDED SUBSTRATE CONDITIONS AND TEMPERATURES

Substrate conditions

• Previous coat (epoxy or polyurethane) must be dry, clean, and roughened if necessary.

Application conditions

• Application acceptable at substrate temperature -5°C (23°F), if dry and ice-free.
• Must be ≥3°C above dew point.
• Relative humidity ≤85%.
• Condensation during/after application may cause color/gloss change.

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INSTRUCTIONS FOR USE

• Mixing ratio (base:hardener by volume): 88:12 (7.33:1)
• Mixed product should be ≥10°C (50°F); add thinner if needed.
• Add thinner only after mixing.
• Over-thinning reduces sag resistance.

Pot life

Mixed product temperature	Pot life
10°C (50°F)	7 hrs
20°C (68°F)	5 hrs
30°C (86°F)	3 hrs
40°C (104°F)	2 hrs

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Air spray

• Thinner: 21-06
• Volume: 3–5%
• Nozzle: 1.0–1.5 mm (0.040–0.060 in)
• Pressure: 0.3–0.4 MPa (3–4 bar; 44–58 psi)

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Airless spray

• Thinner: 21-06
• Volume: 3–5%
• Nozzle: 0.43–0.48 mm (0.017–0.019 in)
• Pressure: 20.0 MPa (200 bar; 2901 psi)

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Brush/Roller

• Thinner: 21-06 (0–5%)
• Cleaning solvent: Thinner 90-53

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ADDITIONAL DATA

Spreading rate and film thickness

DFT	Theoretical spreading rate
50 µm (2.0 mils)	11.0 m²/l (441 ft²/US gal)
60 µm (2.4 mils)	9.2 m²/l (368 ft²/US gal)
75 µm (3.0 mils)	7.3 m²/l (294 ft²/US gal)

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Overcoating interval (DFT ≤ 50 µm / 2.0 mils)

Overcoating with…	Interval	-5°C (23°F)	0°C (32°F)	10°C (50°F)	20°C (68°F)	30°C (86°F)	40°C (104°F)
Itself	Minimum	24 hrs	16 hrs	8 hrs	6 hrs	5 hrs	3 hrs
	Maximum	Unlimited	Unlimited	Unlimited	Unlimited	Unlimited	Unlimited

Note: Surface must be dry and clean.

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Curing time (DFT ≤ 60 µm / 2.4 mils)

Substrate temp.	Dry to handle	Full cure
-5°C (23°F)	24 hrs	15 days
0°C (32°F)	16 hrs	11 days
10°C (50°F)	8 hrs	6 days
20°C (68°F)	6 hrs	4 days
30°C (86°F)	5 hrs	3 days
40°C (104°F)	3 hrs	48 hrs

Notes: Adequate ventilation required. Early condensation/rain may cause color/gloss change.

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SAFETY PRECAUTIONS

• See SDS and product label.
• Solvent-borne paint: avoid inhalation/skin/eye contact.
• Contains polyisocyanate curing agent.

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WORLDWIDE AVAILABILITY

Slight modification of product may occur for compliance with local rules.

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REFERENCES

• PPG SIGMACARE PLUS guide (online maintenance at sea)
• Explanation of product data sheets

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WARRANTY

• PPG warrants title and conformity to specs.
• All other warranties (fitness for purpose, implied) are disclaimed.
• Claims must be made within 5 days of discovery, and within shelf life or 1 year from delivery.
• Failure to notify = no recovery.

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LIMITATIONS OF LIABILITY

• PPG not liable for indirect, incidental, or consequential damages.
• Data is guidance only; based on lab tests.
• User must determine suitability for application.
• Application variations may cause unsatisfactory results.
• Current sheets maintained at www.ppgpmc.com.
• English text prevails over any translation.